Three-dimensional pharyngeal airway changes in dento-skeletal class II patients after two-jaw orthognathic surgery with segmentation - a pilot study

Tan SK 1 , Tang ATH 2 , Leung WK 3 , Zwahlen RA 4

Affiliations 

  • 1 Center of Oral and Maxillofacial Surgery Studies, Faculty of Dentistry, Universiti Teknologi MARA Sungai Buloh Campus, Jalan Hospital, 47000 Selangor Darul Ehsan, Malaysia; Discipline of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Hong Kong, 34, Hospital Road, Sai Ying Pun, Hong Kong SAR, PR China
  • 2 503 Tak Shing house, 20, Des Voeux road, Central, Hong Kong SAR, PR China
  • 3 Discipline of Periodontology, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, 34, Hospital Road, Sai Ying Pun, Hong Kong SAR, PR China
  • 4 Discipline of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Hong Kong, 34, Hospital Road, Sai Ying Pun, Hong Kong SAR, PR China. Electronic address: zwahlen@hku.hk
J Stomatol Oral Maxillofac Surg, 2018 Dec;119(6):461-468.
PMID: 30099221 DOI: 10.1016/j.jormas.2018.07.004

Abstract

PURPOSE: To investigate short- and long-term post-surgical three-dimensional changes of pharyngeal airway morphology and hyoid bone position in dento-skeletal class II deformity patients after two-jaw surgery with segmentation.

METHODS: Relations between skeletal movement, hyoid bone position and three-dimensional pharyngeal airway changes were retrospectively analyzed on pre- and post-surgical CBCTs in dento-skeletal class II patients who underwent orthognathic two-jaw surgery with segmentation.

RESULTS: While long-term significant reductions in length (P= 0.003), surface area (P= 0.042) and volume (P= 0.004) were found in the nasopharynx, the highly significant increases in oropharyngeal airway length, surface area, volume and the minimal cross-sectional area (P 

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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